Analysis strategies for a community trial to reduce adolescent ATOD use: A comparison of random coefficient and ANOVA/ANCOVA models
Analysis strategies for a community trial to reduce adolescent ATOD use: A comparison of random coefficient and ANOVA/ANCOVA models
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DOI：
10.1016/j.cct.2005.09.008
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发表时间：
2006-04-01
影响因子：
2.2
通讯作者：
Arthur, MW
中科院分区：
文献类型：
--
作者：
Murray, DM;Van Horn, ML;Arthur, MW
社区青年发展研究将评估关怀社区(CTC)操作系统对24个参与社区的青少年酒精、烟草、药物使用和其他结果的影响。该研究采用横断面设计和队列设计相结合的方法。我们使用了一项早期研究的数据，其中包括CyDS社区，以估计CyDS干预效果的力量，给出了几个分析模型，这些模型可能适用于定义CyDS横断面设计的多个基线和后续调查。我们比较了事后混合模型ANCOVA模型和随机系数模型，包括一阶段模型和两阶段模型。两阶段前-后混合模型ANCOVA为初步结果提供了最好的动力，并将为检测适度但重要的干预效果提供足够的动力。(C)2005 Elsevier Inc.保留所有权利。
The Community Youth Development Study (CYDS) will evaluate the Communities That Care (CTC) operating system for its effects on alcohol, tobacco, drug use, and other outcomes among adolescents resident in the 24 participating communities. The CYDS employs a combination of both cross-sectional and cohort designs. We use data from an earlier study that included the CYDS communities to estimate power for CYDS intervention effects given several analytic models that might be applied to the multiple baseline and follow-up surveys that define the CYDS cross-sectional design. We compare pre-post mixed-model ANCOVA models against random coefficients models, both in one- and two-stage versions. The two-stage pre-post mixed-model ANCOVA offers the best power for the primary outcomes and will provide adequate power for detection of modest but important intervention effects. (c) 2005 Elsevier Inc. All rights reserved.